Wbist pist



Patente-d Aug, 28?, i923,

masses PATENT @FENCE 'JGSEPH WINKLER, OF CHANUTE, KANSAS.

WRIST PIN.

Application led May 8,

To all whom t may concern;

Be it known that I, Josnrir S. VINKLER,

a citizen of the United States, residing at' Chanute, inthe county ofNeosho and State 4of Kansas, have invented a nets7 and useful Wrist'Pin,ofl-'which'the following is a specilicationiifv Y By Wayhof explanationit may be stated that in a; known forni of drilling rig,jm tion istransmitted :to the walking beam by Way of'a'pitman, the -pitman beingoperated by a Wrist pinin a crank arm on' a shaft. Considerablediflicul'ty has been eX- perienced, heretofore in keeping' the wrist pinsecurely in place in the crank arm, and

the present invention aims to provide novel means for overcoming theaforesaid difiiculty.

' Within the scope 0f what is claimed, a mechanic -may make changes inthe form delineated and described, Without departing from the spirit oftheI invention.

In the drawings Figure lshows in elevation, a crank arm carrying aVwrist pin constructed in accordance with the invention; Figure 2 is asec- 'tion on the line 2 2 4of Figure l, parts appearing in elevation.

The numeral lfmarks'a crank, which may form part of a drilling rig, .ashereinbeforo explained, .the crank having an opening 2 adapted toreceive the driving shaft (not shown). The crank l 'has openings 3,spaced part longitudinally 0f the crank, and in any of the openings 3, aWrist pin 4 is adapted to be mounted, for adjustment, to vary the throw.The Wrist pin 4 has a hub 5 from which extends an arm 6, the arm havinga stud 7 vdisposed parallel to the"4 Wristpin 4 andadapted to bereceived in one of the openings 3. The wrist pin 4 is threaded as at 8to receive a nut 9, the

crank 1 beingv bound between the hub 5 and 1522. serial No. 559324./

fthe arm 6 on the one hand, and the nut 9 onthe other hand, theprojecting stud 7 ,ony the arm 6 cooperating with the nut 'and the hubto hold the wrist pin securely in the crank l. The arm 6 projectsoutwardly towardthe free end of the crank 1, in the drawings but,obviously, if the Wrist pin .were shifted to one of the outer openings 3then,nthe arm 6 might be permitted to` extend inwardly, the projectingstud 7 being received in the opening wherein the pin is mounted in 'thepresent showng \What is claimed is \1. In a device of the classdescribed, a Wrist `pin provided intermediate its ends Withy anarmihaving a stud disposed apv`proximately parallel to the Wrist pin;and

a holding device on one end of the Wrist pin and cooperating with thearm.

2In a `device 'of the class described, a Wrist pin provided intermediateits ends with a hub carrying a projecting arm, the arm. aving a studdisposed approximately paral el tothe Wris'tpin; and a nut threaded onone end of the Wrist pin and "coacting with the hub and the arm.

3. In a device of the class described, a crank having openings; a Wristpin in one opening and supplied with an arm, the arm being provided witha projection received in the other opening; and means on the Wrist pinfor holding the wrist pin in the crank and for holding the projection inthe last specified opening.

In .testimony that I claim the foregoing asnmy own, I have heretoaffixed my signature in the presence of two witnesses.

JSEPH S. WVINKLER.

